绘制图片

Var image=new Image();

image.src=” http://img4.duitang.com/uploads/item/201406/25/20140625182321_4MTau.thumb.700_0.jpeg”;

image.onload=function(){}

Context.drawImage(image,x,y);

Context.drawImage(image,y,w,h);

Context.drawIamge(image,sx,sy,sw,sh,dx,dy,dw,dh);

图片平铺

Var pat= context.createPattern(image,”repeat”);

Context.fillStyle=pat;

Context.fillRect(0,400,300);

图片裁剪

先绘制好路径

Context.clip();